APEC Ultimate Top Tier Reverse Osmosis System Review | RO-90 & RO-PH90

Product : APEC RO-90 & RO-PH90
Type : Reverse Osmosis UnderSink Drinking Water Filter
Filtration Stage : 5 (RO-90) , 6 (RO-PH90)
Product Warranty :  1 year

Top Tier Product With an Affordable Price…

APEC reverse osmosis system has been well known in their quality and durability even for their entry level model, APEC ROES-50. There are a total of 4 systems that sat on the top tier in APEC’s reverse osmosis system.

A high capacity, high capability, top tier 5 stages reverse osmosis filtration system which removed up to 99% TDS.
Similar to APEC RO-90, with an additional Water Neutralizer filter which provide an alkaline taste to the pure water.
Similar to RO-90, it is a 5 stage filters with a permeate pump for houses which has low water pressure (30-50psi)
Similar to RO-90, it is a 5 stage filters with an electric pump. It is suitable for international homes or houses with little or extremely low water pressure. (0-30psi)

This APEC reverse osmosis system review will be focusing on both RO-90 and RO-PH90 as the other two systems are quite similar to the RO-90 with an additional pump.

Did you know that ? APEC RO-90 and RO-PH90 are certified by WQA Gold Seal Award?

High Production Rate: As advertised by APEC, the daily production rate can achieve up to 90 GPD at the optimum  APEC RO-90 Water Filter System condition (60psi and 77 Deg F) and 75 GPD at 50psi.

The appearance of the system looks quite similar to the ROES-50, but it is geared with a higher capacity filtration system in it. The differences in the filter allows water to flow at a higher rate and capable of handling a larger volume.

Alkaline Remineralization: The RO-PH90 has an additional filter which consists of a natural way by adding calcium carbonate to neutralize the slight acidic reverse osmosis water. The pH is expected to be in the range of 8-9 which is optimum for the absorption of our body.

Long Lifespan Filters: APEC has a record of producing long lifespan filters which can lasted for a year. Similar to the ROES-50, the filter replacement for RO-90 and RO-PH90 are in a yearly basis.

Moderate Waste Water: Waste water is expected for all reverse osmosis system, including APEC reverse osmosis system. The waste water stays at a 1:3 ratio where every gallon of pure water produced, 3 gallons of water will go down to the drain. It is certainly not the best, but it is not the worst.

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Technical Specification that you SHOULD KNOW…

Below are the summarize technical specification that you should know before buying the APEC RO-90 / RO-PH90 reverse osmosis system.

  • Water Pressure: 40-85 psi
  • Water Temperature: 40-100 F
  • Capacity: 90 gallons per day (with 60psi)
  • Storage Tank Capacity: 4 gallons
  • Max TDS: 2000ppm
  • System Dimensions: 16″w x 17.5″h x 5.25″d

5/6 Stage of Filtration System…

The APEC RO-90 (RO-PH90) is a 5 (6) stage filtration system. All it’s filters are proudly made in US. It consists of the following:APEC RO-PH90 Filter Stage

Stage 1: 5 Micron Sediment Filter – Standard 10″ Industry Grade which is capable of removing dirt, dust, particles and rust. It is made of high grade high capacity polypropylene which has longer lifespan.

Stage 2 & 3: 2 Stages of Premium Extruded Carbon Block –  Removes odor and taste of chlorine, VOCs and other common chemicals that was found from the source.

Stage 4 :Select FILMTEC (Dow Chemical) High Rejection TFC reverse osmosis membrane
– Remove up to 99% dissolved solid such as flouride, bacteria, lead, radium, virus which is larger than 0.00001 micron using the membrane.

Stage 5: Advanced Coconut Shell Refining Carbon Filter – Remove odor and taste that are coming from the storage tank.

Stage 6 (Only for RO-PH90): Calcite Acidic Water Neutralizer – Increase the pH on the slight acidic reverse osmosis water by adding high quality calcium carbonate.

Unlike the ROES-50, the carbon blocks and reverse osmosis membrane are better in quality and able to handle higher in capacity. APEC’s filters are famous for it’s quality and also their long lifespan.

It Is Easy to Install the RO-90/RO-PH90…

The installation is pretty straight forward as the installation manual is easy to understand. If you have experience in installing water filters, it should takes about an hour.

Spend some time reading the manual before you start installing as it gives you a better idea on the workflow. The diagram below gives you a great picture on how the installation and final product sits under your sink.

Tools that are required :

  • • Variable speed drill
  •  Drill bit: 1/4” (for the waste line), 1/8” (as pilot, not mandatory), and 1/2” (for standard faucet hole, air-gap faucet requires 1&1/4” hole)
  •  5/8”, 9/16” open-end wrench, or adjustable wrench, pliers
  • Phillips screwdriver
  • Utility knife, or scissors
  • Teflon tape

Long Lifespan Filters Means High Quality Filters…

APEC RO-90 and RO-PH90 uses high quality high capacity filters which is able to last for at least a year before it is required for replacement. Most of the products in the market required constant changing of filters to ensure the quality of water that was produced. Suggested replacement timeframe is shown below:

  • Stage 1,2,3 Sediment and Carbon Block Filters: 1 Year
  • Stage 2 Reverse Osmosis Membrane Filter: 3-5 Years (City Water) , 2-3 Years (Private Well)
  • Stage 5 Post Carbon Filter: 3-5 Years 
  • Stage 6 Water Neutralizer Filter : 6-12 Months 

APEC 2X Long LifespanOn average of five years, the replacement cost is just $56 per year for RO-90 and $85 per year for RO-PH90. With the capacity and capability of this filter, the maintenance and replacement cost is consider affordable as compared to other model in it’s class.

The Voice From Existing Owners….

APEC RO-90 receive excellent reviews from it’s existing users. Many of them are impressed by the quality, flow rate and capacity that it can handle. Let’s see what the users talk about this system:

+ Really did a good job of reducing TDS from 208 to 008
+ Filter replacements are inexpensive
+ The tank fills up quick. I think it took less than an hour to fill up the first tank of water
I really wish the tubs were a bit better made.
The flimsy plastic tank valve will not hold in it’s place against the high pressurized tank

  • Reviews by Existing Customers
  • Filtration Effectiveness on Rejection Ratio
  • Quality of the Product
  • Maintenance and Replacement
  • Installation Easiness
  • Cost Effective (Price/Value)


The APEC Ultimate series reverse osmosis water filter system is a great systems in terms of quality, capacity and affordability. On top of that, it is received a Gold Seal Certification by WQA on the quality of the product. I would definitely RECOMMEND the APEC Ultimate Reverse Osmosis System to a large family or people that are using well water as source. Check it out on the latest price.

Wondering how does the APEC RO-90/RO-PH90 compared to others?
Find out more on our latest guide on the best undersink water filter in town

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6 thoughts on “APEC Ultimate Top Tier Reverse Osmosis System Review | RO-90 & RO-PH90”

  1. Thank you for the review on these filters. The information was very useful in helping me identify the difference in performance and economics with the RO-90 and RO-PH90 and other top models. I am in the market for a water softener and will refer to this site often.

  2. Your article is really helpful! I am interested in RO-90. It looks great! I would like to install it on my refrigerator. Can I install it with the ice maker on my fridge? Thank you!

  3. They both look top notch! What does reverse osmosis do, and what does Apec’s system do compared to other brands or those that use faucet or container filters like PUR and Brita?!

    • PUR and Brita filters are entry level water filters. Their speciality are water pitcher and faucet filters.
      Those filters just remove a fraction of the contaminations that a normal reverse osmosis does.
      Furthermore, the filter replacement is quite frequent (Once every 2 months).
      If you are a student or just renting a temporary accommodation, PUR and BRITA is great due to it’s portability.
      If you own a house, I would recommend that you go for those conventional under sink or counter top water filters like APEC.

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